The Obamas decorated the South Lawn of the White House and welcomed more than 4,000 people for trick-or-treating, mostly from 15 Washington-area elementary schools and military families, USA Today reported.

Many stories of The White House being haunted have surfaced in the past. Many spirits, including that of first president John Adams, Abraham Lincoln and Andrew Jackson have been spotted. Winston Churchill, the Prime Minister of the United Kingdom, refused to spend the night after one ghostly encounter.

Pakistani policemen walk past a compound, surrounded in red fabric, where locals reported a firefight took place overnight in Abbotabad, located in Pakistan's Khyber Pakhtunkhwa province on May 2, 2011.

US President George W. Bush and First Lady Laura Bush greet president-elect Barack Obama and his wife Michelle on November 10, 2008 at the South Portico of the White House in Washington, DC. (AFP Photo/Mandel Ngan)